Carbureter.



n. w. SPILLER. W

BARBURETER. APPLICATION FILED OCT-1911912.

1 1 85m 6. Patented. May 30, 1916.

H. W. SPILLEH.

CARBURETER.

APPLICATION FILED 0CT1 19. 1912.

Patented May 30,1916.

2 SHEET$SHEET 2.

AHIW/J w I V 1 ll/fll/ THE COLUMBIA PLANOGRAPH 50., WASHINGTON, 13. c.

HERBERT WILLIAM SPTLLER, OF HAMPS'IEAD, LONDON, ENGLAND.

CARBUBETER.

isaoic.

Specification of Letters Patent.

Patented May 30, 1916.

Application filed October 19, 1912. Serial No. 726,623.

To all to hom it may concern Be it known that I, Hnnnnn'r WVILLIAM SPiLLER, a subject of the King of Great Britain, and a resident of 5 Chesterford Gardens, Hampstead, London, N. W., England, have invented new and useful Improvements in Carbureters for Internal- Combustion Engines, of which the following is the specification.

This invention relates to carbureters for internal combustion engines and particularly'to carburetors of the multiple jet or nozzle type.

The object of the invention is to obtain a greater efficiency by producing a greater power at high speeds of the engine than has hitherto been attained in the working of the apparatus, and a greater economy of the liquid fuel, further objects being to enable the carbureter to more readily respond to the demands made upon it by the engine, and to cheapen the manufacture of the carbureter.

A plurality of jets or nozzles are employed, preferably four, opening into separate channels formed in a vertical cylindrical casing, the separate channels conveying to a common induction pipe, the outlets of the separate channels being controlled by an automatically operated valve.

By means of this invention, the suction upon each nozzle brought into operation in successionis rendered practically constant, and the liquid fuel and air are automatically varied so as to obtain the best working mixture for the engine, under all the conditions of running and the constantly altering speeds of the engine. And in order that my invention may be completely understood, reference should be made to the accompanying sheet of drawings.

Figure 1 is a central vertical sectlon of the carbureter without-the float feed chamher and nozzles or jets. Fig. 2 is a transverse section of Fig. 1 on the line X X. Fig. 3 is a part sectional elevation of the carbureter with a float feed chamber and jets, but without the throttle valve. Fig. 4 is a similar view showing a modification of the central valve rod or stem. Fig. 5 is a vertical section showing a further modification in the automatic valve, and Fig. 6 is a transverse section on the line Z Z of Fig. 5. Like letters of reference refer to like parts in all the figures.

A is the main body or cylindrical casing of the carbureter. The lower part is divided into four channels by means of radial partitions or divisions, having the form in section of a cross. The four channels thus formed B, B B B see Fig. 2,,'are completely separated the one from the other inside the casing A. Each of the said four channels is provided at its lower end with a jet or nozzle, two of which K and K are shown in Figs. 3 and 4. The position of the four nozzles or jets is indicated by the dotted circles K, K K K in Fig. 2.

C is a cylindrical valve mounted on the fixed stem or rod C and adapted to slide vertically thereon. The valve C is operated automatically by the suction of the engine, and it is adapted in sliding vertically upward to open in succession the four outlet ports F, F F F opening respectively the said four channels B, B B B to the annular space E surrounding the valve, which is normally in communication with the induction channel G to the engine. The chamber I or inclosure within the valve C- is always in communication with the atmosphere by means of the central vertical bore or duct H and the lateral duct H The cylindrical casing A is rigidly and concentrically secured within the outer casing A, and the stem or rod C is preferably integrally formed with the stem or core portion A of the cruciform divisions or partitions, see Fig. 2.

The valve C slides vertically upon the stem C and also upon the exterior cylindrical surface of the casing A in which are formed the ports F, F F F The said ports are arranged as in the said prior specification, each a step higher than the next port below, so that when the suction of the engine lifts the valve C, the said ports are opened gradually and successively until all are open, and therefore all the jets or nozzles are supplying to the engine. The lower edge of the valve C is provided with the lip C and the said lower edge is adapted as shown in Fig. 1, to come in its lowest position approximately down to the level of the section line X X, which line serves as an indication for this distance, consequently the lowest port F is always partly open. The port F therefore and the nozzle K by the channel 13 feed first to the engine, when the valve C lifts, the port F opens, and the nozzle K feeds to the engine through the channel B with the further lift of the valve, the ports F F are opened to the F is fully opened, the port F begins to open, and so on.

The hp C on the lower edge of valve C provides an increased surface for the mixture to impinge upon as it flows through the annular space or passage E on its way to. the engine, and thus tends to increase the lifting action on the said valve as each port is opened in succession.

The port F, Fig. 1, is shown dotted in to render the figure clearer, but it would not properly show in this section. W is a throttle valve of usual construction fitted (Fig. 1) immediately above the automatic valve C.

The sliding ring V is provided with four holes adapted to register with four holes V in the casing A, in order to admit additional air to each of the channels B, B The casing A is formed with the jacket wall A to admit hot water from the engine jacket or exhaust gases as may be desired, to raise the temperatureof the carbureter when required.

Referring to Figs. 3 and 4, the float feed chamber M is of ordinary construction. The four nozzles o-r jets K, K K K are screwed at their base into the annular chamber M in communication with the interior of the'float feed chamber M. Only two of the said jets. will show in the part sections Figs. 3 and 4. The lower end of the rod or stem A ispassed through'the central hole in the annular nozzle carrying portion M and the nut M screwed on the lower end 'ofthe" SRIDQ' serves to secure the fioat feed chamber to the carbureter. Bythe removal 'ofthe one nut M therefore, the nozzles and the interior of the carbureter are rendered accessible.

' Referring to Fig. 4, the Valve Cis provided with the central valve stem or rod G which is rigidly secured to the valve and slides therewith. The stem C fits a guide or bore .concentrically formed within the stem or rod A the lower end of the rod C is provided with a nut C in order to limit the lift of the valve C by the nut C.

V This nut therefore serves in lieu of thepin of the said webs slide on the inner surface of the casing A in order to provide the additional guide required by the valve, especially when in the highest position, to insure easy working of the said valve. AL though six guide webs are shown any suitable number may be employed.

Although in the particular embodiment of the invention illustrated in the drawings four nozzles, channels and ports are described and shown, this being the preferred number, any suitable and convenient number of nozzles, channels and ports may be employed.

What I do claim as my invention and desire to secure by Letters Patent is 1. A carbureter for internal combustion engines including a carbureter chamber having a combustible mixture outlet at one end thereof, a plurality of mixture conduits extending in a group within the casing at the end thereof opposite the combustible mixture outlet, the outlet ports of said mixture conduits being arranged in stepped overlapping relation, means for feeding fuel to the mixture conduits, a hollow cup-shaped valve arranged to move longitudinally Within the casing and acting automatically to control the communication of the mixture passages with the chamber, said valve being adapted on rising to successively open the overlapping orts of the mixture conduits, means providing a communication between the interior of the valve and the atmosphere, the valve being actuated by the engine suction and having its closed end disposedto- Ward the combustible mixture outlet and completely open to the engine suction.

2. A carbureter for internal combustion engines including a carbureter chamber having a combustible mixture outlet at one end thereof, a plurality of mixture conduits extending in a group within the casing at the end thereof opposite the combustible mixture outlet, the outlet ports of said mixture conduits being arranged in stepped overlapping relation, means for feeding fuel to the mixture conduits, a hollow cup-shaped valve arranged to move longitudinally within the casing and acting automatically to control the communication of the mixture passages with the chamber, said valve being adapted on rising to successively open the overlapping Cports of the mixture conduits, means provi ing a communication between the interior of the valve and the atmosphere, the valve being actuated by the engine suction and having its closed end disposed toward the combustible mixture outlet and I completely open to the'engine suction, and

said valve being provided with a flange ex tending outwardly around its outer side face providing an impinging surface on the valve for the incoming mixture.

3. A carbureter for internal combustion engines including a carbureterchamber having a combustible mixture outlet at one end thereof, a plurality of mixture conduits extending in a group within the casing at the end thereof opposite the combustible mixture outlet, the outlet ports of said mixture conduits being arranged in stepped overlapping relation, means for'feeding fuel to the mixture conduits, a hollow cup-shaped valve arranged to move longitudinally within the casing and acting automatically to control the communication of the mixture passages with the chamber, said valve being adapted on rising to successively open the overlapping ports of the mixture-conduits, means providing a communication between the interior of the valve and the atmosphere, the valve being actuated by the engine suction and having its closed end disposed toward the combustible mixture outlet and completely open to the engine suction, the walls of the valve at the lower portion thereof being thickened, and said thickened portion being subject to the varying pressure of the passing mixture.

4. A carbureter comprising a carbureter chamber, a combustible mixture outlet at one end of the chamber, said chamber being provided with a part extending within the same at the end thereof opposite the combustible mixture outlet, said part being provided with a plurality of ports arranged in stepped overlapping relation, a plurality of mixture passages communicating with the ports in said part, means for feeding fuel to said mixture passages, a hollow cup-shaped valve movable longitudinally in the casing and acting automatically to control the communication of said ports with the carbureter chamber and being adapted on rising to successively open the overlapping ports of said part, means providing a communication be tween the interior of the valve and the atmosphere, the valve being actuated by the engine suction and having its closed end dis- 1 posed toward the combustible mixture outlet and completely open to the engine suction.

5. A carbureter comprising a carbureter chamber, a combustible mixture outlet at one end of the chamber, said chamber being provided with a part extending within the same at the end thereof opposite the combustible mixture outlet, said part being provided with a plurality of ports arranged in stepped overlapping relation, a plurality of mixture passages communicating with the ports in said part, means for feeding fuel to said mixture passages, a hollow cup-shaped valve movable longitudinally within the casing and acting automatically to control the communication of said ports with the carbureter chamber of the said valve and being adapted on rising to successively open the overlapping ports of said part, means providing a communication between the interior of the valve and the atmosphere, the valve being actuated by the engine suction and having its closed end disposed toward the combustible mixture outlet and completely open to the engine suction, said valve being provided with an annular portion projecting laterally from the outer face of the side wall thereof, said annular projecting portion serving to restrict the passageway for the mixture between the outer walls of the valve and the carbureter chamber.

HERBERT WILLIAM SPILLER.

Witnesses:

. I. D. Roors,

R. WESTACOTT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

